翻訳と辞書 Words near each other ・ Pa Qaleh ・ P572 ・ P58 ・ P59 ・ P5tv ・ P6 ・ P6 (microarchitecture) ・ P60 ・ P600 ・ P600 (neuroscience) ・ P63 ・ P64 ・ P65 ・ P66 (disambiguation) ・ P68 ・ P680 ・ P7 ・ P70 ・ P70-S6 Kinase 1 ・ P700 ・ P70S6 kinase ・ P72 ・ P73 ・ P739 ・ P76 ・ P79 ・ P7C3 ・ P8 ・ P8 Group ・ P80 Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク P680 ： ウィキペディア英語版 P680 P680, or Photosystem II primary donor, (where P stands for pigment) refers to any of the 2 special chlorophyll dimers (also named special pairs), PD1 or PD2. These 2 special pairs form an excitonic dimer, which means that they behave in function as a single entity; i.e., they are excited as if they were a single molecule. The 680 number is its absorption maximum in the red part of the visible spectrum (680 nm). The primary donor receives excitation energy either by absorbing a photon of suitable frequency (colour) or by excitation energy transfer from other chlorophylls within photosystem II. During excitation, an electron is excited to a higher energy level. This electron is subsequently captured by the primary electron acceptor, a pheophytin molecule located within photosystem II near P680. The oxidized P680 (P680+) is subsequently reduced by an electron originating from water (via Oxygen evolving complex). Oxidized P680 (P680+) is the strongest biological oxidizing agent known. It has an estimated redox potential of ~1.3 V. This makes it possible to oxidize water during oxygenic photosynthesis. ==Notes== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「P680」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.